Phys. Rev. B 49, 15341–15343 (1994)High-pressure phase transformation and the equation of state of SrSeReceived 18 January 1994; published in the issue dated 1 June 1994 The crystalline structure of the heavy alkaline earth chalcogenide SrSe was studied at high pressure by x-ray diffraction using a synchrotron source. The NaCl-type (B1) structure of SrSe was found to be stable on loading to 14.2 GPa where the CsCl-type (B2) structure was evidenced with a 10.7% decrease in relative atomic volume. The B2 phase of SrSe persists to 40 GPa, the highest pressure attempted in the experiments. The B1-B2 phase transition was found to be reversible with small hysteresis. The bulk modulus and its pressure derivative were determined for both phases. Systematic behavior among the strontium chalcogenides is discussed. © 1994 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevB.49.15341
DOI:
10.1103/PhysRevB.49.15341
PACS:
64.70.Kb, 62.50.+p, 64.30.+t
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